In a medium pot, heat vegetable broth over medium-high heat, until it reaches a simmer. Once simmering, reduce the heat to low to keep it warm.
Using a large box grater, grate the zucchini and set aside.
In a large skillet or Dutch oven, melt the butter over medium heat. Add the shallots and cook for 5 minutes, until translucent. Add minced garlic and cook for another minute.
Reduce the heat to medium-low and add the grated zucchini. Cook for about 2-3 minutes, until it has softened slightly.
Pour in the Arborio rice and stir frequently for 2 minutes, until it has become toasted with a nutty aroma.
Pour in the white wine; stir to de-glaze the pan and scrape up any browned bits on the bottom of pan.
Stir in ½ cup of warmed vegetable broth until completely absorbed into the rice, then add add in another ½ cup and repeat. Continue to add broth ½ cup at a time until it's fully absorbed and the rice is cooked al dente.
Add Parmesan cheese, salt, and black pepper, and give it a good stir.
Turn off the heat. Stir in fresh basil, lemon juice, and lemon zest.
Serve immediately and garnish with additional fresh basil. Season to taste with additional salt and pepper.